Stealth aerogarden budget grow 70w total

Realised that the roots are not getting enough oxygen so added a bigger pump and changed neuts to advance nutrients micro grow bloom at 150ppm with phd water at 5.7 plants look stressed flushed water started at the end and i was using citric acid to ph down ph kept going up to 7.5+ Invested in ph up ph down towirds the end of week 3 but the damage was done plants look drowned and root zone unhealthy and alot of it was damaged too whilst cleaning resorvoir From the gunk left from miracle grow liquid feed